Synthesis of highly active Mg-Based hydrides using hydriding combustion synthesis and NbF5 Additives

M. G. Chourashiya*, C. N. Park, C. J. Park

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Superiority of the hydriding combustion (HC) technique over conventional metallurgical approach to the synthesis of cost-effective Mg based hydrides, which show promise as hydrogen storage materials, is well known. In the present research, we report further improvements in HC prepared Mg-based materials, achieved by optimizing the preparative parameters of HC and by catalytic addition. Mg90-Ni60-C40 composites prepared using optimized processing parameters were ball-milled with NbF5 (10 h) and characterized for their micro-structural and hydriding properties. The ball-milled/catalyzed powder showed decreased crystallinity with CNTs on its surfaces. Surface area of the ball-milled powder decreased to almost half of the as-HC powder, while TG analysis revealed a four-fold decrease in the desorption temperature of the milled powder compared to that of the as-HC prepared powder. Activated samples achieved the maximum absorption/desorption limits (5.3 wt.%) at as low as 100°C, underlining the possibility of the use of these materials in portable hydrogen storage devices.

Original languageEnglish
Article number1250025
JournalFunctional Materials Letters
Volume5
Issue number3
DOIs
StatePublished - Sep 2012
Externally publishedYes

Keywords

  • absorption/desorption kinetics
  • hydriding combustion
  • hydrogen storage
  • Mg-based alloys
  • NbF catalyst

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